/**
 * Clean up raw piped output so the agent sees readable text, not terminal
 * control noise.
 *
 * 1. Strip all ANSI escape sequences (colors, cursor movement, line clears).
 * 2. Simulate carriage-return overwrites: for each line, split on `\r` and
 *    keep only the last segment — this is what the terminal would display
 *    after a spinner/progress bar finishes.
 * 3. Collapse runs of blank lines.
 */
export declare function sanitizePipedOutput(raw: string): string;
/**
 * If stdin is a pipe (not a TTY), read **all** data until EOF and return it as
 * a string. The returned promise only resolves once the write end of the pipe
 * is closed — i.e. the sending process has fully exited — so callers are
 * guaranteed to receive the complete output, not a partial snapshot from a
 * program that writes progressively.
 *
 * Returns `null` when:
 * - stdin is a TTY (interactive terminal)
 * - the pipe was empty or contained only whitespace
 */
export declare function drainPipedStdin(): Promise<string | null>;
/**
 * Reopen `/dev/tty` (or `CON` on Windows) as `process.stdin` so that the
 * interactive TUI can read keyboard input after the original piped stdin has
 * been consumed.
 *
 * @returns `true` if the swap succeeded, `false` if a TTY could not be opened
 * (e.g. running in a headless CI container with no controlling terminal).
 */
export declare function reopenStdinFromTTY(): boolean;
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